Atomic-matter-wave diffraction evidenced in low-energy Na++Rb charge-exchange collisions

Abstract

Single charge transfer in low-energy Na++87Rb(5s,5p) collisions is investigated using magneto-optically trapped Rb atoms and high-resolution recoil-ion momentum spectroscopy. The three-dimensional reconstruction of the recoil-ion momentum provides accurate relative cross sections for the active channels along with their associated distributions in projectile scattering angle. The measurements are accompanied by molecular close-coupling calculations. The predicted diffractionlike oscillations in angular distributions are clearly resolved by the experiment. An excellent agreement is found between the present molecular calculations and the experimental data

Energy-dependent relative charge transfer cross sections of Cs++ Rb(5s, 5p)

“…This distortion has been corrected in software and does not appear to degrade the resolution in scattering angle. Energy dependent diffraction-like oscillations reminiscent of data from a different system [15] can be compared to rigorous two center atomic orbital and molecular close coupling calculations [15,18]. 4.6 13.6 ± 1.2 9.6 ± 1.2 5.5 6.7 ± 0.6 6.7 ± 0.7…”

“…The data are suitable for use as a check of future theoretical calculations; for example using the two center atomic or molecular orbital close-coupling method [15,18].…”

“…The dynamics in swift ion-atom collision of 1.5 MeV/amu O 8+ + Li were studied at an unprecedented level of precision and detail. In a different experiment, using MOTRIMS, low-energy single charge transfer Na + + 87 Rb(5s, 5p) collisions were investigated using trapped Rb atoms as the target [15]. High resolution, fully differential cross sections in scattering angle, initial state, and final state of the system were measured with an extraction of the recoil ions transverse to the ion beam axis and a fast switch for the MOT magnetic fields.…”

High-Resolution Probe of Coherence in Low-Energy Charge Exchange Collisions with Oriented Targets

“…Our MOTRIMS setup has been described in details elsewhere [16,17]. We therefore focus hereinafter on the transformations we made to merge efficient orientation and RIMS techniques within a MOT.…”

“…The angular resolution achieved ranges from ∆θ=70 µrad at 1 keV to 28 µrad at 5keV. The measurements are compared to MOCC calculations detailed in [16]. Briefly MOCC is a semiclassical approach which combines a classical description of nuclear motion and a quantum-mechanical description of electron transitions.…”